text: /**
   * \file pkcs12.h
   *
   * \brief PKCS#12 Personal Information Exchange Syntax
   */
  /*
   *  Copyright The Mbed TLS Contributors
   *  SPDX-License-Identifier: Apache-2.0
   *
   *  Licensed under the Apache License, Version 2.0 (the "License"); you may
   *  not use this file except in compliance with the License.
   *  You may obtain a copy of the License at
   *
   *  http://www.apache.org/licenses/LICENSE-2.0
   *
   *  Unless required by applicable law or agreed to in writing, software
   *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
   *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   *  See the License for the specific language governing permissions and
   *  limitations under the License.
   */
  #ifndef MBEDTLS_PKCS12_H
  #define MBEDTLS_PKCS12_H
  
  #include "mbedtls/build_info.h"
  
  #include "mbedtls/md.h"
  #include "mbedtls/cipher.h"
  #include "mbedtls/asn1.h"
  
  #include <stddef.h>
  
  /** Bad input parameters to function. */
  #define MBEDTLS_ERR_PKCS12_BAD_INPUT_DATA                 -0x1F80
  /** Feature not available, e.g. unsupported encryption scheme. */
  #define MBEDTLS_ERR_PKCS12_FEATURE_UNAVAILABLE            -0x1F00
  /** PBE ASN.1 data not as expected. */
  #define MBEDTLS_ERR_PKCS12_PBE_INVALID_FORMAT             -0x1E80
  /** Given private key password does not allow for correct decryption. */
  #define MBEDTLS_ERR_PKCS12_PASSWORD_MISMATCH              -0x1E00
  
  #define MBEDTLS_PKCS12_DERIVE_KEY       1   /**< encryption/decryption key */
  #define MBEDTLS_PKCS12_DERIVE_IV        2   /**< initialization vector     */
  #define MBEDTLS_PKCS12_DERIVE_MAC_KEY   3   /**< integrity / MAC key       */
  
  #define MBEDTLS_PKCS12_PBE_DECRYPT      0
  #define MBEDTLS_PKCS12_PBE_ENCRYPT      1
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  #if defined(MBEDTLS_ASN1_PARSE_C)
  
  /**
   * \brief            PKCS12 Password Based function (encryption / decryption)
   *                   for cipher-based and mbedtls_md-based PBE's
   *
   * \param pbe_params an ASN1 buffer containing the pkcs-12PbeParams structure
   * \param mode       either MBEDTLS_PKCS12_PBE_ENCRYPT or MBEDTLS_PKCS12_PBE_DECRYPT
   * \param cipher_type the cipher used
   * \param md_type     the mbedtls_md used
   * \param pwd        the password used (may be NULL if no password is used)
   * \param pwdlen     length of the password (may be 0)
   * \param input      the input data
   * \param len        data length
   * \param output     the output buffer
   *
   * \return           0 if successful, or a MBEDTLS_ERR_XXX code
   */
  int mbedtls_pkcs12_pbe( mbedtls_asn1_buf *pbe_params, int mode,
                  mbedtls_cipher_type_t cipher_type, mbedtls_md_type_t md_type,
                  const unsigned char *pwd,  size_t pwdlen,
                  const unsigned char *input, size_t len,
                  unsigned char *output );
  
  #endif /* MBEDTLS_ASN1_PARSE_C */
  
  /**
   * \brief            The PKCS#12 derivation function uses a password and a salt
   *                   to produce pseudo-random bits for a particular "purpose".
   *
   *                   Depending on the given id, this function can produce an
   *                   encryption/decryption key, an nitialization vector or an
   *                   integrity key.
   *
   * \param data       buffer to store the derived data in
   * \param datalen    length to fill
   * \param pwd        password to use (may be NULL if no password is used)
   * \param pwdlen     length of the password (may be 0)
   * \param salt       salt buffer to use
   * \param saltlen    length of the salt
   * \param mbedtls_md         mbedtls_md type to use during the derivation
   * \param id         id that describes the purpose (can be MBEDTLS_PKCS12_DERIVE_KEY,
   *                   MBEDTLS_PKCS12_DERIVE_IV or MBEDTLS_PKCS12_DERIVE_MAC_KEY)
   * \param iterations number of iterations
   *
   * \return          0 if successful, or a MD, BIGNUM type error.
   */
  int mbedtls_pkcs12_derivation( unsigned char *data, size_t datalen,
                         const unsigned char *pwd, size_t pwdlen,
                         const unsigned char *salt, size_t saltlen,
                         mbedtls_md_type_t mbedtls_md, int id, int iterations );
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif /* pkcs12.h */
  